#include <iostream>
#include <cmath>

using namespace std;
class Circle
{
private:
    double r;
public:
    void setR(double r)
    {
        this->r=r;
    }
    double getR()
    {
        return r;
    }
     double area()
    {
        return M_PI * r * r;
    }
    double circumference()
    {
        return M_PI * r * 2;
    }

};

int main()
{
    Circle cir;
    cir.setR(1.0);
    cout << "Area:"<<cir.area()<<" Circumference:"<<cir.circumference()<<endl;
    return 0;
}
